How to find Concavity or Convexity part in an Image?

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Sabarinathan Vadivelu
If this was my input Image, How to find that red dot position? Is there any procedures or algorithms??

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Theo Walker
Theo Walker 2013-6-8
One easy way would be to dilate the image, then erode the image. Take the result, and subtract your original image from it.

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Image Analyst
Image Analyst 2013-6-8

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